The formula for the volume and surface area of a sphere will be given to you in the exam, so you will not need to memorise these. \(\text{The volume of a sphere} ~=~ \frac {4}{3} \times \pi \times ...

2 \end{array}\) In the exam \(\text{Surface area} = 4 \pi r^2\) is given on the formula sheet A hemisphere is half of a sphere. The volume can be found by calculating the volume of the whole ...

Larger ice has less surface area so melts ... ice spheres (also known as sphere ice or ice balls) are usually around 2 to 2.5 ...